KR20240025407A - Wireless power transmittng device for wirelessly transmitting power and method for operating thereof - Google Patents

Abstract

The wireless power transmission device includes a resonance circuit corresponding to a first frequency, a rectifier circuit configured to rectify first AC power of the first frequency provided from the resonance circuit, and converting the rectified power into second AC power of a second frequency. It may include at least one conversion circuit set to convert, at least one transmission coil connected to each of the at least one conversion circuit, at least one switch connected to the at least one resonance circuit, and a controller. The controller, based on confirmation that a first wireless power reception device supporting a first charging method based on the first frequency is disposed on at least a portion of the at least one charging area of the wireless power transmission device, the resonance circuit may be set to control the at least one switch to form a closed loop. The controller, based on confirmation that a second wireless power reception device supporting a second charging method based on the second frequency is disposed on at least a portion of the at least one charging area of the wireless power transmission device, the resonance circuit The at least one switch can be controlled so that it does not form a closed loop. The controller may be set to control at least a portion of the at least one conversion circuit to provide the second AC power of the second frequency. The second AC power may be provided to at least a portion of the at least one transmission coil.

Description

A wireless power transmission device that transmits power wirelessly and a method of operating the same {WIRELESS POWER TRANSMITTNG DEVICE FOR WIRELESSLY TRANSMITTING POWER AND METHOD FOR OPERATING THEREOF}

The present disclosure relates to a wireless power transmission device that transmits power wirelessly and a method of operating the same.

For many people living in modern times, portable digital communication devices have become an essential element. Consumers want to be provided with a variety of high-quality services whenever and wherever they want. In addition, due to the recent IoT (Internet of Things), various sensors, home appliances, and communication devices that exist in our lives are being networked into one. In order to operate these various sensors smoothly, a wireless power transmission system is needed. Electronic devices that receive power wirelessly can be implemented not only as small-scale Bluetooth earphones, wearing devices, and smartphones, but also as large-scale electronic devices such as robots and vacuum cleaners.

Wireless power transmission includes magnetic induction, magnetic resonance, and electromagnetic wave methods. The magnetic induction or magnetic resonance method is advantageous for charging electronic devices located relatively close to a wireless power transmission device. The electromagnetic wave method is more advantageous than the magnetic induction or magnetic resonance method for transmitting power over long distances up to several meters. The electromagnetic wave method is mainly used for long-distance power transmission, and can transmit power most efficiently by determining the exact location of the power receiver at a distance.

Wireless power receiving device Additionally, wireless power transmission may support at least one charging method among magnetic induction, magnetic resonance, and electromagnetic wave methods. In order to charge a wireless power receiving device using various charging methods, the wireless power transmitting device may support a plurality of charging methods.

According to one embodiment, a wireless power transmission device includes a resonance circuit corresponding to a first frequency, a rectifier circuit configured to rectify first AC power of the first frequency provided from the resonance circuit, and a second AC power transmitting the rectified power. At least one conversion circuit configured to convert alternating current power of a second frequency, at least one transmitting coil connected to each of the at least one conversion circuit, at least one switch connected to the at least one resonant circuit, and a controller. can do. The controller, based on confirmation that a first wireless power reception device supporting a first charging method based on the first frequency is disposed on at least a portion of the at least one charging area of the wireless power transmission device, the resonance circuit may be set to control the at least one switch to form a closed loop. The controller, based on confirmation that a second wireless power reception device supporting a second charging method based on the second frequency is disposed on at least a portion of the at least one charging area of the wireless power transmission device, the resonance circuit The at least one switch can be controlled so that it does not form a closed loop. The controller may be set to control at least a portion of the at least one conversion circuit to provide the second AC power of the second frequency. The second AC power may be provided to at least a portion of the at least one transmission coil.

According to one embodiment, a resonance circuit corresponding to a first frequency, a rectifier circuit configured to rectify the first alternating current power of the first frequency provided from the resonance circuit, and converting the rectified power into second alternating current power of a second frequency. A method of operating a wireless power transmission device comprising at least one conversion circuit set to convert, at least one transmission coil connected to each of the at least one conversion circuit, and at least one switch connected to the at least one resonance circuit. Based on confirmation that a first wireless power reception device supporting a first charging method based on the first frequency is disposed on at least a portion of the at least one charging area of the wireless power transmission device, the resonance circuit is closed. It may include controlling the at least one switch to form a closed loop. The operating method is based on confirming that a second wireless power receiving device supporting a second charging method based on the second frequency is disposed on at least a portion of the at least one charging area of the wireless power transmitting device, the resonance It may include controlling the at least one switch so that the circuit does not form a closed loop. The operating method may further include controlling at least a portion of the at least one conversion circuit to provide the second AC power of the second frequency. The second AC power may be provided to at least a portion of the at least one transmission coil.

Figure 1 shows a wireless power transmission and reception system according to one embodiment.
FIG. 2 is a diagram for explaining the structure of a wireless power transmission device according to an embodiment.
FIG. 3A is a block diagram of a wireless power transmission device when a resonance circuit forms a closed loop according to an embodiment.
FIG. 3B is a block diagram of a wireless power transmission device when a resonance circuit does not form a closed loop according to an embodiment.
FIG. 4A is a flowchart illustrating a method of operating a wireless power transmission device according to an embodiment.
FIG. 4B is a flowchart illustrating a method of operating a wireless power transmission device according to an embodiment.
FIG. 5 is a flowchart illustrating a method of operating a wireless power transmission device according to an embodiment.
FIG. 6 is a flowchart illustrating a method of operating a wireless power transmission device according to an embodiment.
FIG. 7 is a flowchart illustrating a method of operating a wireless power transmission device, an external wireless power transmission device, and a first wireless power reception device according to an embodiment.
FIG. 8 is a flowchart illustrating a method of operating a wireless power transmission device, an external wireless power transmission device, and a first wireless power reception device according to an embodiment.
FIG. 9 is a flowchart illustrating a method of operating a wireless power transmission device, an external wireless power transmission device, and a first wireless power reception device according to an embodiment.
Figure 10 is a block diagram of a wireless power transmission device according to an embodiment.
11A to 11C are diagrams for explaining the configuration of at least one switch according to embodiments.
FIG. 12A is a diagram for explaining the on/off state of a switch according to an embodiment.
FIG. 12B is a diagram for explaining the on/off state of a switch according to an embodiment.
FIG. 13 shows a flowchart for explaining a method of operating a wireless power transmission device according to an embodiment.
FIG. 14 shows a flowchart for explaining a method of operating a wireless power transmission device according to an embodiment.
FIG. 15 shows a flowchart for explaining a method of operating a wireless power transmission device according to an embodiment.

Figure 1 shows a wireless power transmission and reception system according to one embodiment. The embodiment of FIG. 1 will be described with reference to FIG. 2 . FIG. 2 is a diagram for explaining the structure of a wireless power transmission device according to an embodiment.

A wireless power transmission and reception system according to an embodiment may include a wireless power transmission device 101. The wireless power transmission device 101 may receive power 11a wirelessly, for example, from an external wireless power transmission device 11. For example, the external wireless power transmission device 11 may include a wired power interface 12. The external wireless power transmission device 11 can receive power from an external source through the wired power interface 12. The external wireless power transmission device 11 can wirelessly transmit power 11a using the received power.

The external wireless power transmission device 11 according to one embodiment may support, for example, a first charging method (eg, resonance method). In the case of a resonance method, the external wireless power transmission device 11 includes, for example, a power source, a direct current-to-alternating current conversion circuit, an amplification circuit, an impedance matching circuit, at least one capacitor, at least one coil, and an out-of-band communication circuit. (e.g. BLE (bluetooth low energy) communication circuit), etc. At least one capacitor and at least one coil may constitute a resonance circuit. The external wireless power transmission device 11 may be implemented in a manner defined in, for example, the Alliance for Wireless Power (A4WP) standard (or the air fuel alliance (AFA) standard). The external wireless power transmission device 11 may include a coil that can generate an induced magnetic field when a current (eg, alternating current) flows according to a resonance method. The process of the external wireless power transmission device 11 generating a magnetic field through a coil can be expressed as transmitting power wirelessly. In addition, as will be described later, the process in which the wireless power transmission device 101 generates a magnetic field through a transmission coil based on a second charging method (eg, induction method) can be expressed as wirelessly transmitting power. For example, the wireless power receiving device 12 supporting a first charging method (e.g., resonance method) receives power 11a from the external wireless power transmitting device 11 based on the first charging method. can receive at least part of. Based on the generated magnetic field, induced electromotive force may be generated in the wireless power receiving device 12. The process of generating induced electromotive force in the wireless power receiving device 12 can be expressed as the wireless power receiving device 12 receiving power wirelessly.

The wireless power transmission device 101 according to an embodiment may transmit power wirelessly based on a second charging method (eg, inductive method). As described above, the wireless power transmission device 101 may not include a wired power interface. The wireless power transmission device 101 may perform wireless power transmission based on the second charging method using at least a portion of the power 11a wirelessly transmitted by the external wireless power transmission device 11. The wireless power transmission device 101 may include an internal battery or may not include an internal battery, depending on implementation. When not including an internal battery, the wireless power transmission device 101 uses at least a portion of the power 11a wirelessly transmitted by the external wireless power transmission device 11 to wirelessly transmit power based on the second charging method. can be performed. When including an internal battery, the wireless power transmission device 101 uses power from the internal battery and/or at least a portion of the power 11a that the external wireless power transmission device 11 transmits wirelessly, 2 Wireless power transmission can be performed based on the charging method. The wireless power transmission device 101 may charge the internal battery using at least a portion of the wirelessly transmitted power 11a. Meanwhile, in another embodiment, the wireless power transmission device 101 may include a wired power interface and may receive power from an external source through the wired power interface.

For example, the second wireless power receiving device 14 supporting a second charging method (e.g., inductive method) may be placed on the first housing 110 of the wireless power transmitting device 101. . A second housing 111 on which an object can be mounted may be connected to the first housing 110. For example, the second wireless power receiving device 14 may be supported by the second housing 111 and may be placed on the first housing 110 accordingly. A transmitting coil 105 for a second charging method (eg, inductive method) may be included in the first housing 110 . The center point of the transmitting coil 105 may be separated by h1 from one end of the first housing 110, for example, which may be set based on the position of the receiving coil within the second wireless power receiving device 14. Yes, but there is no limit. For example, the second wireless power receiving device 14 may be a smartphone, and h1 may be set based on the location of the general receiving coil of the smartphone. Alternatively, although not shown, the wireless power transmission device 101 may include a plurality of transmission coils for a second charging method (eg, inductive method) included in the first housing 110. As a plurality of transmitting coils are included in the first housing 110, even when wireless power receiving devices of various sizes are mounted in the second housing 111, wireless power receiving devices of various sizes can transmit wirelessly with relatively high efficiency. Power can also be received.

For example, the third wireless power receiving device 15 supporting a second charging method (e.g., inductive method) may be disposed on the third housing 112 of the wireless power transmitting device 101. . One end of the third housing 112 may be connected to one end of the first housing 101, for example, as shown in FIG. 2, but there is no limitation. For example, when the wireless power transmission device 101 is placed on a flat surface, the third housing 112 may have a shape that can contact the flat surface. When the third housing 112 is in contact with a plane, the first housing 110 may be positioned to have an angle of less than 90 degrees with the plane, and accordingly, the second wireless power receiving device 14 may be connected to the second housing ( 111). The third housing 112 may include a transmitting coil 107 for a second charging method (eg, inductive method). The position of the transmitting coil 107 is not limited. For example, the third wireless power receiving device 15 may be, but is not limited to, a relatively small wearable electronic device such as a wireless earphone or a wristwatch-type electronic device. Alternatively, although not shown, the wireless power transmission device 101 may include a plurality of transmission coils for a second charging method (eg, inductive method) included in the third housing 112. As a plurality of transmitting coils are included in the third housing 112, even when wireless power receiving devices are placed in various locations, power may be received wirelessly with relatively high efficiency.

For example, the wireless power transmission device 101 may transmit power according to an induction method. When the wireless power transmission device 101 is inductive, the wireless power transmission device 101 may include, for example, a power source, a DC-AC conversion circuit, an amplifier circuit, an impedance matching circuit, at least one capacitor, at least one It may include a coil, a communication modulation/demodulation circuit, etc. At least one capacitor may form a resonance circuit with at least one coil. The wireless power transmission device 101 may be implemented in a manner defined in the wireless power consortium (WPC) standard (or Qi standard). The wireless power transmission device 101 can communicate with the wireless power reception devices 14 and 15. For example, the wireless power transmission device 101 may communicate with the wireless power reception devices 14 and 15 according to an in-band method. The wireless power transmission device 101 performs FSK based on the data to be transmitted, so that the wireless power reception devices 14 and 15 can confirm the data. The wireless power receiving devices 14 and 15 perform ASK (for example, may be called on/off keying) based on the data to be transmitted, thereby performing the wireless power transmitting device 101. ), you can check the data. The wireless power transmission device 101 may confirm data by, for example, performing demodulation and/or decoding based on changes in the magnitude of current, voltage, and/or power applied from the coils 105 and 107. For convenience of explanation, in-band communication based on encoding and/or FSK modulation and/or ASK modulation may be expressed as the transmission of a communication signal, and in-band communication based on FSK demodulation and/or ASK demodulation and/or decoding may be expressed as transmission of a communication signal. Those skilled in the art will understand that, for convenience, it can be expressed as the reception of a communication signal. Meanwhile, this is an example, and the wireless power transmission device 101 may perform communication based on an out-band method with the wireless power reception devices 14 and 15.

According to one embodiment, the wireless power transmission device 101 additionally includes a coil (or, It may also include a conductor with a pattern for detection). The wireless power transmission device 101 uses the first wireless power reception device 13 of the first charging method based at least on a coil for detection and/or a change in impedance (or load) in the coil 103. It can also be detected. Meanwhile, this is an example, and the wireless power transmission device 101 may detect the first wireless power reception device 13 based on sensing data confirmed by a sensing means for other detection. For example, the wireless power transmission device 101 may receive a communication signal (e.g., an out-of-band signal, but is not limited to) from the first wireless power reception device 13 and/or the external wireless power transmission device 11. Based on , the first wireless power reception device 13 may be detected. There is no limitation to the detection method of the first wireless power receiving device 13, and various detection methods will be described later.

For example, the electronic device 13 supporting the first charging method (eg, resonance method) may be placed in the first housing 110 by being held by the second housing 111 . The wireless power transmission device 101 has a resonance circuit of the coil 103 and a capacitor (not shown) based on confirmation that the electronic device 13 supporting the first charging method is disposed in the first housing 110. At least one switch (not shown) can be controlled to form a closed loop. When the resonance circuit of the coil 103 and the capacitor (not shown) forms a closed loop, the resonance circuit may be designed to have a resonance frequency of the first charging method. When the resonant circuit forms a closed loop, the resonant circuit can be used as a repeater in the first charging method. For example, a coil 103 to form a resonance circuit may be disposed within the first housing 110. The coil 103, for example, has been described as having a larger outer diameter than the second coil 105 and/or being disposed on the outer side of the second coil 105, but this is an example and the second coil There are no restrictions on the size, shape, and/or placement location of 105. For example, the electronic device 13 supporting the first charging method (e.g., resonance method) may receive at least a portion of the power 11a transmitted wirelessly from the external wireless power transmission device 11. there is. Meanwhile, when the distance between the external wireless power transmitting device 11 and the first wireless power receiving device 13 is relatively large, the wireless power between the external wireless power transmitting device 11 and the first wireless power receiving device 13 Power transmission efficiency may be relatively low (in other words, the coupling coefficient between the external wireless power transmission device 11 and the first wireless power reception device 13 may be expressed as relatively low). Accordingly, the amount of charging per hour for the first wireless power receiving device 13 is relatively small, so there is a possibility that the time required to fully charge may increase. Alternatively, there may be a limit to the distance for charging the first wireless power receiving device 13 with a charging amount per hour above a certain level. As described above, when a closed-loop resonance circuit operating as a repeater exists, the wireless power transmission efficiency between the external wireless power transmission device 11 and the first wireless power reception device 13 can be relatively increased ( In other words, it may be expressed that the coupling coefficient between the external wireless power transmission device 11 and the first wireless power reception device 13 is relatively increased. Accordingly, the amount of charging per hour for the first wireless power receiving device 13 can be relatively increased, and the time required to fully charge can be shortened. Alternatively, the distance for charging the first wireless power receiving device 13 with a charging amount per hour above a certain level may increase.

According to one embodiment, the wireless power transmission device 101 may include an indicator 115. For example, when a sufficient amount of power is received by the first charging method, the wireless power transmission device 101 may control the indicator 115 to provide a corresponding indication. For example, the wireless power transmission device 101 may control the indicator 115 to provide an indication when the voltage at the output terminal of the coil 103 or the rectified voltage (VREC) is above the threshold voltage. There are no limits. Accordingly, the user can recognize whether the wireless power transmission device 101 can operate using power 11a from the external wireless power transmission device 11.

According to one embodiment, the wireless power transmission device 101 may transmit power according to an electromagnetic wave method. When the wireless power transmission device 101 uses an electromagnetic wave method, the wireless power transmission device 101 may include, for example, a power source, a DC-AC conversion circuit, an amplifier circuit, a distribution circuit, a phase shifter, and a plurality of antennas (e.g. : It may include an antenna array for power transmission including a patch antenna, a dipole antenna, and/or a monopole antenna, and an out-of-band communication circuit (e.g., a BLE communication module). Each of the plurality of antennas may form a radio frequency (RF) wave. The wireless power transmission device 101 can perform beam-forming by adjusting the phase and/or amplitude of the electrical signal input for each antenna. The electronic devices 2 and 3 may include antennas capable of outputting current using RF waves formed around them. The process of the wireless power transmission device 101 forming an RF wave can be expressed as the wireless power transmission device 101 transmitting power wirelessly. The process in which a wireless power receiving device supporting the RF method outputs current from an antenna using an RF wave can be expressed as the wireless power receiving device receiving power wirelessly. In the present disclosure, the wireless power transmission device 101 has been described as using a resonance method as the first charging method and an inductive method as the second charging method, but any one of these charging methods may be replaced by the RF method. there is.

FIG. 3A is a block diagram of a wireless power transmission device when a resonance circuit forms a closed loop according to an embodiment. FIG. 3B is a block diagram of a wireless power transmission device when a resonance circuit does not form a closed loop according to an embodiment.

Referring to FIG. 3A, according to one embodiment, the wireless power transmission device 101 includes a transmission coil 105, a controller 120, a resonance circuit 121, at least one switch 122, and a rectifier circuit 131. ), and/or may include a conversion circuit 133.

According to one embodiment, the resonance circuit 121 may include the coil 103 described in FIGS. 1 and 2 and at least one capacitor (not shown). The coil 103 and at least one capacitor (not shown) may form a resonance circuit 121, and the resonance frequency of the resonance circuit 121 may be set to, for example, a first charging method (e.g., a resonance method). ), but there is no limit. The resonance circuit 121 (or the coil 103 included in the resonance circuit 121) may form a coupling 13a with the first wireless power reception device 13.

According to one embodiment, the on/off state of at least one switch 122 may be controlled by the controller 120. In the example of FIG. 3A, the on/off of each of the at least one switch 122 may be controlled so that the resonance circuit 121 forms a closed loop, and for convenience of explanation, the state of the at least one switch 122 is It can also be expressed that is controlled to the first state. Various embodiments in which the state of at least one switch 122 is controlled to the first state will be described later. As shown in FIG. 3A, when the resonance circuit 121 forms a closed loop, the resonance circuit 121 can be used as a repeater for the first charging method. For example, the first wireless power receiving device 13 may receive at least a portion of the power 11a from the external wireless power transmitting device 11. The frequency of the power 11a may, for example, have a frequency defined in the first charging method (eg, 6.78 MHz, but is not limited). As the resonance circuit 121 forming a closed loop is disposed near the receiving coil (or receiving resonance coil) of the first wireless power receiving device 13, the receiving coil (or receiving coil) of the first wireless power receiving device 13 , the magnitude of the induced electromotive force in the receiving resonant coil) may increase. Accordingly, the amount of charging per hour for the first wireless power receiving device 13 can be relatively increased, and the time required to fully charge can be shortened. Alternatively, the distance for charging the first wireless power receiving device 13 with a charging amount per hour above a certain level may increase. Meanwhile, the first wireless power receiving device 13 may not be placed on the first housing 110 of the wireless power transmitting device 101, but may be placed at a certain distance away. If the distance between the first wireless power receiving device 13 and the external wireless power transmitting device 11 is relatively long, the wireless power transmission efficiency may be reduced, but the repeater is connected to the first wireless power receiving device 13 and the external wireless power transmitting device 11. By being placed between the wireless power transmission devices 11, a decrease in wireless power transmission efficiency can be compensated for.

According to one embodiment, the controller 120 confirms the detection (e.g., placement on the first housing 110, but is not limited) of the first wireless power receiving device 13 supporting the first charging method. Based on this, at least one switch 122 can be controlled so that the resonance circuit 121 forms a closed loop. Various methods by which the controller 120 detects a wireless power receiving device supporting the first charging method will be described later. For example, information about the on/off state of each of the at least one switch 122 corresponding to detection of the first wireless power receiving device 13 may be stored in the wireless power transmitting device 101, and the controller 120 may control the state of at least one switch 122 (for example, control it to the first state) with reference to this. The controller 120 may be implemented as a microprocessor, micro controlling unit (MCU), field programmable gate array (FPGA), application specific integrated circuits (ASIC), or a set of analog elements, but there is no limitation on the form of implementation. .

According to one embodiment, the controller 120 includes at least one block (or may be named a communication module) for out-band communication (e.g., but not limited to BLE communication) and/or in-band communication. ) may also be included. Alternatively, the block for out-band communication and/or the block for in-band communication may be implemented independently from the controller 120 (e.g., may be implemented with a different hardware block from the controller 120). there is. The controller 120 may transmit/receive communication signals with at least some of the external wireless power transmission device 11 and the wireless power reception devices 13, 14, and 15. For example, the controller 120 may detect at least some of the wireless power reception devices 13, 14, and 15 based on transmission/reception of communication signals. For example, the controller 120 performs pre-charging procedures (e.g., identification, configuration, and authentication of the wireless power receiving devices 13, 14, and 15) based on transmission/reception of communication signals. (authentication, authority check, cross-connection check, negotiation, calibration, registration, charging decision, charging start command, but there is no limit), and/or perform procedures during charging (e.g., but are not limited to reporting, adjustment of charging power, error (overtemperature, overvoltage, overcurrent, etc.) determination). According to one embodiment, the wireless power transmission device 101 includes instructions that cause the wireless power transmission device 101 to perform an operation, a stack associated with a first charging method, a stack associated with a second charging method, and/or It may also include memory to store a stack for communication. For example, the memory may be implemented to be included in the controller 120, or may be implemented as hardware independent from the controller 120.

Meanwhile, in the drawing of FIG. 3A, the resonance circuit 121 and the switch 122 are used to express the point that the resonance circuit 121 forms a closed loop as at least one switch 122 is controlled to the first state. Those skilled in the art will understand that the two solid lines between the lines represent a connection, and that the number of solid lines is not intended to represent a single-ended signal or a differential signal. In addition, in the drawing of FIG. 3A, when the resonance circuit 121 forms a closed loop, it is shown as if there is no electrical connection between the switch 122 and the rectifier circuit 131, but this is an example. , Depending on the implementation, an electrical connection may exist between the switch 122 and the rectifier circuit 131, which will be described later.

Referring to FIG. 3B, according to one embodiment, the controller 120 detects the second wireless power receiving device 14 supporting the second charging method (e.g., placement on the first housing 110). can be detected, but there are no restrictions). The controller 120 is a detection method based on the second charging method (e.g., a detection method supported by the Qi standard), a change in Q-factor during application of a ping signal, a change in impedance (or load), and /Or the second wireless power receiving device 14 may be detected based on whether there is a response corresponding to the digital-ping signal, but there is no limitation. Meanwhile, the wireless power transmission device 101 applies a periodic ping signal to the transmitting coil 105 based on the method supported by the Qi standard, or applies power for detection differently from the method supported by the Qi standard. It can also be applied continuously.

According to one embodiment, the controller 120 operates at least one switch to prevent the resonance circuit 121 from forming a closed loop based on detection of the second wireless power receiving device 14 supporting the second charging method. 122 can be controlled, and for example, this can be expressed as controlling the state of at least one switch 122 to the second state. Meanwhile, when the state of at least one switch 122 is in the second state, the controller 120 connects the at least one switch based on detection of the second wireless power receiving device 14 supporting the second charging method. The state of (122) can be maintained. The controller 120 may control at least one switch 122 so that power provided from the resonance circuit 121 is provided to the rectifier circuit 131 . Meanwhile, in Figure 3b, the resonance circuit 121 and the switch 122 are connected by one solid line, which is only intended to express that the resonance circuit 121 does not form a closed loop and is intended to be a single-ended path. Those skilled in the art will understand that this is not the case.

As at least one switch 122 is controlled to the second state, power provided from the resonance circuit 121 may be provided to the rectification circuit 131. The power provided from the resonance circuit 121 may be induced electromotive force by the external wireless power transmission device 11, and thus may have the frequency of the first charging method (for example, 6.78 MHz, but there is no limit). The rectifier circuit 131 can rectify alternating current power into direct current power. The rectifier circuit 131 may be implemented with a full-bridge diode, a half-bridge diode, or a synchronized bridge FET, but is not limited thereto. The conversion circuit 133 may output alternating current power having a frequency of the second charging method (for example, 100 to 205 kHz, but without limitation) using the rectified power. The conversion circuit 133 is not limited as long as it has a configuration (for example, an inverter) that can convert direct current power into alternating current power. AC power having the frequency of the second charging method may be provided to the transmitting coil 105. The controller 120 may control the conversion circuit 133 to output AC power for charging. As AC power is applied to the transmitting coil 105, power 14a (e.g., magnetic field) may be transmitted wirelessly, and the second wireless power receiving device 14 may receive power wirelessly. . As described above, the wireless power transmission device 101 is a second wireless power reception device 14 that supports a second charging method by using at least a portion of the power 11a received based on the first charging method. wireless charging can be performed.

FIG. 4A is a flowchart illustrating a method of operating a wireless power transmission device according to an embodiment.

According to one embodiment, the wireless power transmission device 101 (e.g., controller 120) supports a first charging method (e.g., resonance method) on at least a portion of the charging area in operation 401. It can be confirmed that the first wireless power receiving device 13 is deployed. For example, the wireless power transmission device 101 may receive a communication signal indicating that the first wireless power reception device 13 is detected from the external wireless power transmission device 11, for example, through out-band communication. You can. The wireless power transmission device 101 may confirm the arrangement of the first wireless power reception device 130 based on the received communication signal. For example, the wireless power transmission device 101 may detect the first wireless power reception device 13 based on the reception of a communication signal indicating that the first wireless power reception device 13 is detected and the satisfaction of at least one additional condition. ) can be checked. For example, the wireless power transmission device 101, as an additional condition, checks whether the change in impedance (or load) for the coil 103 is greater than or equal to a threshold value, and transmits the first signal based on the additional condition being satisfied. The arrangement of the wireless power receiving device 13 may be confirmed, but this is an example and there are no restrictions on additional conditions. For example, the wireless power transmission device 101 can confirm the arrangement of the first wireless power reception device 13 without transmitting/receiving a communication signal with the external wireless power transmission device 11. For example, the wireless power transmission device 101 may confirm the arrangement of the first wireless power reception device 13 based on transmission/reception of a communication signal with the first wireless power reception device 13. The wireless power transmission device 101 confirms the placement of the first wireless power reception device 13 based on the transmission/reception of a communication signal with the first wireless power reception device 13 and satisfaction of at least one additional condition. You can. For example, the wireless power transmission device 101, as an additional condition, checks whether the change in impedance (or load) for the coil 103 is greater than or equal to a threshold value, and transmits the first signal based on the additional condition being satisfied. The arrangement of the wireless power receiving device 13 may be confirmed, but this is an example and there are no restrictions on additional conditions.

According to one embodiment, the wireless power transmission device 101 (e.g., controller 120) includes a first wireless device that supports a first charging method (e.g., a resonance method) on at least a portion of the charging area. Based on the arrangement of the power receiving device 13, in operation 403, at least one switch 122 may be controlled to the first state so that the resonance circuit 121 forms a closed loop. For example, the wireless power transmission device 101 may confirm that the first wireless power reception device 13 is deployed while the state of at least one switch 122 is in the second state. If the state of at least one switch 122 is the second state, the wireless power transmission device 101 switches the state of the at least one switch 122 from the second state to the first state. It can be controlled so that a switch control signal of is provided. For example, the wireless power transmission device 101 may confirm that the first wireless power reception device 13 is deployed while the state of at least one switch 122 is in the first state. If the state of at least one switch 122 is in the first state, the wireless power transmission device 101 may control the state of the at least one switch 122 to be maintained in the first state.

FIG. 4B is a flowchart illustrating a method of operating a wireless power transmission device according to an embodiment.

According to one embodiment, the wireless power transmission device 101 (e.g., controller 120) supports a second charging method (e.g., inductive method) on at least a portion of the charging area in operation 411. It can be confirmed that the second wireless power receiving device 14 is deployed. For example, the wireless power transmission device 101 uses a detection method based on a second charging method (e.g., a detection method supported by the Qi standard), changes in Q-factor during application of a ping signal, impedance (or , load), and/or based on whether or not there is a response corresponding to the digital-ping signal, the second wireless power receiving device 14 may be detected, but there is no limitation. Meanwhile, the wireless power transmission device 101 applies a periodic ping signal to the transmitting coil 105 based on the method supported by the Qi standard, or applies power for detection differently from the method supported by the Qi standard. It can also be applied continuously.

According to one embodiment, the wireless power transmission device 101 (e.g., controller 120) includes a second wireless charging method (e.g., inductive method) on at least a portion of the charging area. Based on the arrangement of the power receiving device 14, in operation 413, at least one switch 122 may be controlled to the second state so that the resonance circuit 121 does not form a closed loop. For example, the wireless power transmission device 101 may confirm that the second wireless power reception device 14 is deployed while the state of at least one switch 122 is in the second state. If the state of at least one switch 122 is in the second state, the wireless power transmission device 101 can control the state of at least one switch 122 to be maintained. For example, the wireless power transmission device 101 may confirm that the second wireless power reception device 14 is deployed while the state of at least one switch 122 is in the first state. If the state of at least one switch 122 is in the first state, the wireless power transmission device 101 switches the state of at least one switch 122 from the first state to the second state. It can be controlled so that a switch control signal of is provided. In operation 415, the wireless power transmission device 101 may control at least one conversion circuit 133 to convert the rectified power into second AC power for charging. Accordingly, the conversion circuit 133 can convert the rectified power into second AC power, and the second AC power can be provided to the transmission coil 105. Accordingly, the wireless power transmission device 101 can charge the second wireless power reception device 14 that supports the second charging method.

FIG. 5 is a flowchart illustrating a method of operating a wireless power transmission device according to an embodiment.

According to one embodiment, the wireless power transmission device 101 (eg, controller 120) may control at least one switch 122 to the second state in operation 501. In operation 503, the wireless power transmission device 101 may perform a detection operation of the second charging method by controlling at least one conversion circuit 133 to convert rectified power into AC power for detection. The transmitting coil 105 may be provided with alternating current power for detection. The detection operation of the second charging method includes, for example, an operation to check a change in Q-factor during application of a ping signal, an operation to check a change in impedance (or load), and/or an operation to check whether there is a response corresponding to the digital-ping signal. It may include, but there is no limitation. In operation 505, the wireless power transmission device 101 may check whether a wireless power reception device of the second charging method is detected. For example, the wireless power transmission device 101 may transmit a communication signal corresponding to a digital ping based on a change in the Q-factor above the first threshold and/or a change in the impedance (or load) above the second threshold. The conversion circuit 133 can be controlled to transmit. For example, the conversion circuit 133 may be controlled so that FSK can be performed to represent data corresponding to a digital ping, but there is no limitation. The wireless power transmission device 101 can check whether there is a response from the wireless power reception device. For example, the wireless power transmission device 101 may check whether there is a response from the wireless power reception device based on demodulation and/or decoding of the voltage applied to the transmission coil 105. Based on confirming the response from the wireless power receiving device, the wireless power transmitting device 101 can confirm the arrangement of the wireless power receiving device of the second charging method, but the above-described method is merely exemplary. When a wireless power receiving device of the second charging type is detected (505-Yes), the wireless power transmitting device 101 includes at least one conversion circuit (507) to convert the rectified power into AC power for charging in operation 507. By controlling 133), wireless charging operation of the second charging method can be performed. The transmitting coil 105 may be provided with alternating current power for charging. Meanwhile, the wireless power transmission device 101 uses the second charging method, for example, based on performing an identification procedure, a configuration procedure, a negotiation procedure, and/or a calibration procedure. wireless charging operations can be performed, but there are no restrictions.

FIG. 6 is a flowchart illustrating a method of operating a wireless power transmission device according to an embodiment.

According to one embodiment, the wireless power transmission device 101 (eg, controller 120) may control at least one switch 122 to the second state in operation 601. The wireless power transmission device 101 may perform a detection operation of the second charging method by controlling at least one conversion circuit 133 to convert rectified power into AC power for detection in operation 603. In operation 605, the wireless power transmission device 101 may check whether a wireless power reception device of the second charging method is detected. When a wireless power receiving device of the second charging method is detected (607-Yes), the wireless power transmitting device 101 includes at least one conversion circuit (607) to convert the rectified power into alternating current power for charging in operation 607. By controlling 133), wireless charging operation of the second charging method can be performed. If the wireless power receiving device of the second charging type is not detected (607-No), the wireless power transmitting device 101 may check whether the wireless power receiving device of the first charging type is detected in operation 609. . As described above, for example, the wireless power transmission device 101 determines whether a wireless power reception device of the first charging type is detected based on a communication signal from the external wireless power transmission device 11 and/or additional conditions. You can check whether or not. For example, the wireless power transmission device 101 determines whether the wireless power reception device of the first charging type is detected based on the communication signal from the wireless power receiving device of the first charging type and/or additional conditions. You can check it. When a wireless power receiving device of the first charging type is detected (609-Yes), the wireless power transmitting device 101 may control at least one switch 122 to the first state in operation 611. Accordingly, the resonance circuit 121 can form a closed loop, and the resonance circuit 121 can be used as a repeater for the first charging method.

FIG. 7 is a flowchart illustrating a method of operating a wireless power transmission device, an external wireless power transmission device, and a first wireless power reception device according to an embodiment.

According to one embodiment, the external wireless power transmission device 11 may perform a detection procedure with the first wireless power reception device 13 in operation 701. In one example, the external wireless power transmission device 11 may transmit/receive at least one communication signal with the first wireless power reception device 13 as an example of a detection procedure. The external wireless power transmitting device 11 is an external wireless power receiving device 13 based on a communication signal (for example, an Advertisement signal, but is not limited to) from the first wireless power receiving device 13. It can be confirmed that it is located near the wireless power transmission device 11. For example, the external wireless power transmission device 11 may transmit a communication signal (for example, a Connection request corresponding to an Advertisement signal, but is not limited) to the first wireless power reception device 13. The first wireless power reception device 13 may identify the external wireless power transmission device 11 based on the received communication signal. Based on the transmission/reception of communication signals, a communication connection (e.g., BLE connection, but without limitation) may be established. The external wireless power transmitting device 11 and the first wireless power receiving device 13 provide their respective information (e.g., PRU static information and/or PTU) based on transmission/reception of additional communication signals through a communication connection. static information (but there are no restrictions) can be exchanged. For example, the external wireless power transmission device 11 may determine whether to join the power network of the first wireless power reception device 13.

According to one embodiment, the external wireless power transmission device 11 may provide a communication signal indicating that a wireless power reception device of the first charging method is detected to the wireless power transmission device 101 in operation 703. As described above, the wireless power transmission device 101, through a communication block included in the controller 120 (or a communication block independent from the controller 120, in this case may be called a communication module), A communication signal can be received from the external wireless power transmission device 11. In operation 705, the wireless power transmission device 101 may confirm that a wireless power reception device of the first charging method is detected based on the received communication signal. The wireless power transmission device 101 may confirm that the external wireless power transmission device 11 detects a wireless power reception device of the first charging method, based on information included in the received communication signal. In one example, the wireless power transmission device 101 may confirm that a wireless power reception device of the first charging method is detected based only on information included in the communication signal. In another example, the wireless power transmission device 101 detects that the wireless power reception device of the first charging method is based on the reception of a communication signal from the external wireless power transmission device 11 and satisfaction of at least one additional condition. You can also check that it works. For example, the wireless power transmission device 101 may check whether an additional condition is satisfied based on whether the change in impedance (or load) for the coil 103 is greater than or equal to a threshold value. For example, when a communication signal indicating that a wireless power receiving device of the first charging type is detected is received from the external wireless power transmitting device 11, the change in impedance (or load) for the coil 103 is the threshold value. In the above case, the wireless power transmission device 101 can confirm that the wireless power reception device of the first charging method has been detected. For example, even when a communication signal indicating that a wireless power receiving device of the first charging type is detected is received from the external wireless power transmitting device 11, the change in impedance (or load) for the coil 103 is critical. If it is less than the value, the wireless power transmission device 101 may confirm that the wireless power reception device of the first charging method has not been detected, but there is no limitation. As described above, the wireless power transmitting device 101 controls the state of the at least one switch 122 to the first state based on detection of the wireless power receiving device of the first charging method, thereby controlling the resonance circuit 121 ) can be used as a repeater by forming a closed loop.

FIG. 8 is a flowchart illustrating a method of operating a wireless power transmission device, an external wireless power transmission device, and a first wireless power reception device according to an embodiment.

According to one embodiment, the wireless power transmission device 101 may perform a detection procedure with the first wireless power reception device 13 in operation 801. In one example, the wireless power transmission device 101 may transmit/receive at least one communication signal with the first wireless power reception device 13 as an example of a detection procedure. The wireless power transmitting device 101 transmits wireless power of the first wireless power receiving device 13 based on a communication signal (for example, an Advertisement signal, but is not limited) from the first wireless power receiving device 13. It can be confirmed that it is located near the transmitting device 101. For example, the wireless power transmission device 101 may transmit a communication signal (for example, a Connection request corresponding to an Advertisement signal, but there is no limitation) to the first wireless power reception device 13. The first wireless power reception device 13 may identify the wireless power transmission device 101 based on the received communication signal. Based on the transmission/reception of communication signals, a communication connection (e.g., BLE connection, but without limitation) may be established. The wireless power transmission device 101 may confirm that a wireless power reception device of the first charging type is detected, for example, based on satisfaction of at least one additional condition. For example, the wireless power transmission device 101 may check whether an additional condition is satisfied based on whether the change in impedance (or load) for the coil 103 is greater than or equal to a threshold value. For example, when a communication signal indicating that a wireless power receiving device of the first charging type is detected is received from the external wireless power transmitting device 11, the change in impedance (or load) for the coil 103 is the threshold value. In the above case, the wireless power transmission device 101 can confirm that the wireless power reception device of the first charging method has been detected. Additional terms may include, but are not limited to, for example, terms defined in AFA standards. The wireless power transmission device 101 and the first wireless power reception device 13 provide their respective information (e.g., PRU static information and/or PTU static information) based on transmission/reception of additional communication signals through a communication connection. information (but without restrictions) can be exchanged. For example, the wireless power transmission device 101 may determine whether to join the power network of the first wireless power reception device 13.

According to one embodiment, the wireless power transmission device 101 may provide a communication signal indicating that a wireless power reception device of the first charging method is detected to the external wireless power transmission device 11 in operation 803. As described above, the wireless power transmission device 101, through a communication block included in the controller 120 (or a communication block independent from the controller 120, in this case may be called a communication module), A communication signal can be transmitted to the external wireless power transmission device 11. In operation 805, the external wireless power transmission device 11 may confirm that a wireless power reception device of the first charging type is detected based on the received communication signal. The communication signal includes, for example, information indicating that a wireless power receiving device of the first charging method has been detected. However, this is an example, and the communication signal may also include information requesting provision of charging power. The external wireless power transmission device 11 may also wirelessly transmit power for charging. For example, the external wireless power transmission device 11 may increase the size of the transmission power, but there is no limit. The wireless power transmission device 101 may control the state of at least one switch 122 to the first state in operation 807. The resonance circuit 121 can be used as a repeater by forming a closed loop.

Although not shown, the wireless power transmission device 101 may transmit a communication signal requesting adjustment (for example, increase or decrease) of power for charging after charging to the external wireless power transmission device 11. . For example, the wireless power transmission device 101 receives a communication signal for reporting the current status (e.g., VREC, but without limitation) from the first wireless power reception device 13 that is performing charging. can do. The wireless power transmission device 101 may determine whether to adjust power for charging based on current state information. If the VREC of the first wireless power receiving device 13 is less than the specified voltage value, the wireless power transmitting device 101 can confirm that an increase in charging power is required. In this case, the wireless power transmission device 101 may transmit a communication signal requesting an increase in charging power to the external wireless power transmission device 11. The external wireless power transmission device 11 may adjust power for charging based on the received communication signal.

FIG. 9 is a flowchart illustrating a method of operating a wireless power transmission device, an external wireless power transmission device, and a first wireless power reception device according to an embodiment.

According to one embodiment, the wireless power transmission device 101 may perform a detection procedure with the first wireless power reception device 13 in operation 901. Since the detection procedures of the wireless power transmitting device 101 and the wireless power receiving device 13 are described above in FIG. 8, the description here is not repeated. In operation 903, the wireless power transmission device 101 may provide a communication signal indicating that a wireless power reception device of the first charging method is detected to the external wireless power transmission device 11. The wireless power transmission device 101 may provide a handover command to the first wireless power reception device 13 in operation 905. Thereafter, the connection (eg, BLE connection) between the wireless power transmission device 101 and the first wireless power reception device 13 may be released.

According to one embodiment, the first wireless power receiving device 13 may transmit an advertising signal to the external wireless power transmitting device 11 in operation 907. The external wireless power transmission device 11 may provide a corresponding connection request to the first wireless power reception device 13 based on reception of the advertising signal. Accordingly, in operation 911, a communication connection (for example, may be a BLE connection, but is not limited to) between the external wireless power transmission device 11 and the first wireless power reception device 13 may be established. The wireless power transmission device 101 may control at least one switch 212 to the first state in operation 913. For example, the wireless power transmission device 101 can be used as a repeater after handing over the first wireless power reception device 13. The external wireless power transmission device 11 may provide power for charging in operation 915. Although not shown, the external wireless power transmission device 110 may receive a communication signal for reporting the current status (e.g., VREC, but without limitation) from the first wireless power reception device 13. The external wireless power transmission device 110 may determine whether to adjust power for charging based on information on the current state. If the VREC of the first wireless power receiving device 13 is less than the specified voltage value, the external wireless power transmitting device 110 can confirm that an increase in charging power is required. In this case, the external wireless power transmission device 110 may increase charging power. As described above, detection of the first wireless power receiving device 13 of the first charging method is performed by the wireless power transmitting device 101 and the first wireless power receiving device 13, and the subsequent procedures are performed by the external wireless power receiving device 13. It may also be performed by the power transmitting device 11 and the wireless power receiving device 103.

Figure 10 is a block diagram of a wireless power transmission device according to an embodiment.

According to one embodiment, the wireless power transmission device 101 includes a resonance circuit 121, at least one switch 122, a rectifier circuit 131, a regulator 132, and at least one DC/DC converter. (141, 142), at least one conversion circuit (133, 134), and/or at least one transmission coil (105, 107).

As described above, when the state of at least one switch 122 is controlled to the first state, the resonance circuit 121 may form a closed loop. When the state of at least one switch 122 is controlled to the second state, the resonance circuit 121 may not form a closed loop. When the state of at least one switch 122 is controlled to the second state, the alternating current power of the frequency of the first charging method (for example, 6.78 MHz, but not limited) output from the resonance circuit 121 is connected to the rectifier circuit. It can be provided as (131). The rectifier circuit 131 may rectify the provided alternating current power and provide direct current power. The regulator 132 may regulate the provided direct current power and provide regulated power. Regulated power may be provided to at least one DC/DC converter 141 and 142. Although not shown, at least one matching network may be connected to at least one point.

According to one embodiment, at least one DC/DC converter 141 and 142 may convert the voltage of DC power and provide it. For example, when a wireless power receiving device such as a smart phone is set to be charged by the transmitting coil 105, the DC/DC converter 141 converts the voltage to a voltage for charging the wireless power receiving device such as a smart phone. It can be configured to perform conversion, but there are no restrictions. For example, when a small wearable electronic device such as wireless earphones is set to be charged by the transmitting coil 107, the DC/DC converter 142 is configured to perform conversion to a voltage for charging the small wearable electronic device. It can be set, but there is no limit. The DC/DC converters 141 and 142 may adjust the output voltage according to the control of the controller 120, for example, but there is no limitation. At least one conversion circuit 133 or 134 may provide alternating current power using the input direct current power. At least one conversion circuit 133 or 134 may adjust the frequency of AC power under control of the controller 120, for example. For example, when charging the second wireless power receiving device 14 through the transmission coil 105, the controller 120 may adjust the frequency of AC power by controlling the conversion circuit 133. Meanwhile, a wireless power receiving device may be placed on any one of the transmitting coils 105 and 107, for example, on the transmitting coil 105. In this case, the controller 120 may control the DC/DC converter and/or conversion circuit 133 so that power for charging is provided to the transmission coil 105. The controller 120 controls the DC/DC converter 142 and/or the conversion circuit 134 to perform the detection procedure, or prevents the DC/DC converter 142 and/or the conversion circuit 134 from operating. You can also control it.

11A to 11C are diagrams for explaining the configuration of at least one switch according to embodiments.

Referring to FIG. 11A, the resonance circuit 121 may include a coil 103 and at least one capacitor 104a and 104b. Although at least one capacitor (104a, 104b) is shown as connected in series with the coil (103), this is an example and one skilled in the art will understand that at least one capacitor may also be connected in parallel with the coil (103). The wireless power transmission device 101 may include a first switch 122a connected in parallel to the coil 103 of the resonance circuit 121. The first switch 122a may be connected, for example, between the resonance circuit 121 and the rectifier circuit 131. When the first switch 122a is controlled to be in the on state, the coil 103 and at least one capacitor 104a and 104b may form a closed loop. In the embodiment of FIG. 11A, the on state of the first switch 122a may be the first state of the at least one switch 122 described above. While the first switch 122a is controlled to be in the on state, the coil 103 forming a closed loop and at least one capacitor 104a and 104b can be used as a repeater in the first charging method. Meanwhile, when the first switch 122a is controlled to be in the off state, the coil 103 and at least one capacitor 104a and 104b may not form a closed loop. For example, in the embodiment of FIG. 11A, the off state of the first switch 122a may be the second state of the at least one switch 122 described above. The first switch 122a may be implemented with, for example, a FET, and in some cases may be implemented with bidirectional FETs.

Meanwhile, even while the first switch 122a is controlled to be in the on state, some of the induced electromotive force may be provided to the rectifier circuit 133. For example, the ratio of the power provided from the resonance circuit 121 forming a closed loop and the power provided to the rectifier circuit 133 may be 1/2 to 1/10, but is not limited. Accordingly, even while the resonance circuit 121 forms a closed loop, rectified power from the rectifier circuit 133 can be provided, so that components for the second charging method (e.g., the conversion circuit 133 )) operation may be possible. The wireless power transmitting device 101 according to an embodiment controls the first switch 122a to operate as a repeater according to detection of the wireless power receiving device of the first charging type, while also operating as a wireless power receiving device of the second charging type. The detection operation can be performed. For example, the wireless power transmission device 101 may control the conversion circuit 133 and a communication circuit (not shown) for in-band communication to perform a detection operation. If a wireless power receiving device of the second charging type is detected, the wireless power transmitting device 101 selects and charges either the wireless power receiving device of the first charging type or the wireless power receiving device of the second charging type. , or both devices may be charged substantially at the same time.

Referring to FIG. 11B, the wireless power transmission device 101 according to an embodiment includes a first switch 122a connected in parallel to the coil 103 and a connection between the first switch 122a and the rectifier circuit 131. It may include a connected second switch 122b. For example, when the wireless power transmission device 101 detects a wireless power transmission device of the first charging method, the first switch is configured so that the coil 103 and at least one capacitor (104a, 104b) forms a closed loop. (122a) can be controlled to be in the on state. In addition, the wireless power transmission device 101 can prevent the resonance circuit 121 from being electrically connected to the rectifier circuit 131 by controlling the second switch 122b to be in the off state. For example, even when the first switch 122a is controlled to be on and the second switch 122b is also controlled to be on, there is a possibility that some of the induced electromotive force is provided to the rectifier circuit 131, and thus Accordingly, by controlling the second switch 122b to be in the off state, the charging amount per hour of the wireless power receiving device of the first charging method may be increased. For example, the wireless power transmission device 101 controls the first switch 122a to be turned on and the second switch 122b to be turned off in order to relatively quickly charge the wireless power reception device of the first charging method. It can be controlled by state. In the embodiment of FIG. 11B, the first switch 122a is in an on state and the second switch 122b is in an off state, which may be the first state of the at least one switch 122 described above. For example, in order to charge the wireless power receiving device of the first charging method relatively quickly, the first state of the at least one switch 122 described above can be maintained. If the wireless power receiving device of the first charging method and the wireless power receiving device of the second charging method are simultaneously charged, or while the wireless power receiving device of the first charging method is being charged, the wireless power receiving device of the second charging method When determining whether to detect, the wireless power transmission device 101 may control the first switch 122a to be in the on state and the second switch 122b to be in the on state. For example, when the wireless power receiving device of the first charging type is disposed in the first housing 110 in FIG. 2 and the wireless power receiving device of the second charging type is disposed in the third housing 112, Simultaneous charging may be possible. Alternatively, when simultaneously charging the wireless power receiving device of the first charging method and the wireless power receiving device of the second charging method, or while charging the wireless power receiving device of the first charging method, the wireless power receiving device of the second charging method When determining whether to detect , the wireless power transmission device 101 may control the first switch 122a to be in an off state and the second switch 122b to be on. Meanwhile, when the wireless power receiving device of the second charging method is detected, the wireless power transmitting device 101 controls the first switch 122a to be turned off and the second switch 122b to be turned on. can do. In the embodiment of FIG. 11B, the second state of at least one switch 122 may be that the first switch 122a is in an off state and the second switch 122b is in an on state.

Referring to FIG. 11C, according to one embodiment, the wireless power transmission device 101 may include a first sub-switch 122aa and a second sub-switch 122ab connected in parallel to the coil 103. . The first sub-switch 122aa and the second sub-switch 122ab are FETs and may be connected in opposite directions. The wireless power transmission device 101 may include a third sub-switch 122ba and a fourth sub-switch 122bb connected between the sub-switches 122aa and 122ab and the rectifier circuit 131. The third sub-switch 122ba and the fourth sub-switch 122bb are FETs and may be connected in opposite directions. For example, when the wireless power transmitting device 101 detects a wireless power receiving device of the first charging method, the first sub The switch 122aa and the second sub-switch 122ab can be controlled to be in the on state. In this case, for example, the wireless power transmission device 101 may control the third sub-switch 122ba and the fourth sub-switch 122bb to be in an off state. For example, when the wireless power transmitting device 101 detects a wireless power receiving device of the second charging method, the third charging device 101 prevents the coil 103 and the at least one capacitor 104a and 104b from forming a closed loop. The sub-switch 122ba and the fourth sub-switch 122bb can be controlled to be in the on state. In this case, for example, the wireless power transmission device 101 may control the first sub-switch 122aa and the second sub-switch 122ab to be in an off state. For example, the wireless power transmission device 101 may provide a switch control signal (Switch on/off) to the third sub-switch 122ba and the fourth sub-switch 122bb. The wireless power transmission device 101 may include an inverting element 129 connected to the first sub-switch 122aa and the second sub-switch 122ab. The switch control signal (Switch on/off) may be inverted by the inverting element 129 and provided to the first sub-switch 122aa and the second sub-switch 122ab. Accordingly, the states of the first sub-switch 122aa and the second sub-switch 122ab may be controlled to be opposite to the states of the third sub-switch 122ba and the fourth sub-switch 122bb.

FIG. 12A is a diagram for explaining the on/off state of a switch according to an embodiment.

According to one embodiment, the wireless power transmission device 101 may include a first switch 122a connected in parallel to the coil 103 as shown in FIG. 11A. For example, the wireless power transmission device 101 may control the first switch 122a to be in the off state 1201 in the basic state (eg, before the first time point t1), but there is no limitation. In the off state 1201 of the first switch 122a, the wireless power transmission device 101 determines whether to detect a wireless power receiving device of the first charging type and/or whether to detect a wireless power receiving device of the second charging type. You can check. While the first switch 122a is in the off state 1201, rectified power may be provided from the rectifier circuit 131, thereby enabling operation of components for the second charging method. The wireless power transmission device 101 can confirm whether a wireless power reception device of the second charging method is detected by operating components for the second charging method.

According to one embodiment, it is assumed that a wireless power reception device of the first charging method is detected at a first time point t1. The wireless power transmission device 101 turns on the first switch 122a so that the resonance circuit 121 forms a closed loop based on the detection of the wireless power reception device of the first charging method at a first time point t1. It can be controlled in the on state (1202). As the resonance circuit 121 forms a closed loop, the resonance circuit 121 can be used as a repeater.

Meanwhile, at the second time point t2, the wireless power transmission device 101 collects (or removes) the wireless power receiving device of the first charging type and fully charges the wireless power receiving device of the first charging type. (full charge), and/or occurrence of an error in the wireless power receiving device of the first charging method can be confirmed. The wireless power transmission device 101 may check the above-described charging interruption events based on transmission/reception of a communication signal with the first charging type wireless power reception device and/or the external wireless power transmission device 11. There are no restrictions on the verification method. Based on the charging interruption event, the wireless power transmission device 101 may control the first switch 122a to be in the off state 1203. The resonance circuit 121 may not form a closed loop.

According to one embodiment, it is assumed that a wireless power reception device of the first charging method is detected at a third time point t3. At a third time point t3, the wireless power transmission device 101 turns on the first switch 122a so that the resonance circuit 121 forms a closed loop based on the detection of the wireless power reception device of the first charging type. It can be controlled in the on state (1204). As the resonance circuit 121 forms a closed loop, the resonance circuit 121 can be used as a repeater.

Meanwhile, at the fourth time t4, it is assumed that the wireless power transmission device 101 has detected a wireless power reception device of the second charging method. As described above, even while the first switch 122a remains in the on state, a portion of the induced electromotive force may be provided to the rectifier circuit 131, and thus the operation of the second charging type component may be possible. . The wireless power transmission device 101 may determine whether to detect a wireless power reception device of the second charging method using components of the second charging method, for example, at the fourth time point t4. Let us assume that a wireless power receiving device of this type has been detected. For example, the wireless power transmission device 101 may confirm that the wireless power reception device of the second charging method will be charged, or may confirm that the second charging method will be charged as a higher priority. In this case, the wireless power transmission device 101 may control the first switch 122a to be in the off state (1205). Meanwhile, if the wireless power transmission device 101 confirms that the wireless power reception device of the first charging method and the wireless power reception device of the second charging method will be charged simultaneously, for example, the first switch 122a The on state (1204) may be maintained, but there is no limit.

FIG. 12B is a diagram for explaining the on/off state of a switch according to an embodiment.

According to one embodiment, the wireless power transmission device 101 may include a first switch 122a and a second switch 122b as shown in FIG. 11B. For example, the wireless power transmission device 101 controls the first switch 122a to be in the off state 1211 in the basic state (e.g., before the first time point t1) and the second switch 122b. ) can be controlled to the on state (1221), but there is no limit. In the off state 1211 of the first switch 122a and the on state 1221 of the second switch 122b, the wireless power transmission device 101 determines whether to detect a wireless power reception device of the first charging method and/ Alternatively, it can be confirmed whether a wireless power receiving device of the second charging type is detected. While the first switch 122a is in the off state 1211 and the second switch 122b is in the on state 1221, rectified power may be provided from the rectifier circuit 131, thereby performing the second charging method. The operation of the parts may be possible. The wireless power transmission device 101 can confirm whether a wireless power reception device of the second charging method is detected by operating components for the second charging method.

According to one embodiment, it is assumed that a wireless power reception device of the first charging method is detected at a first time point t1. The wireless power transmission device 101 turns on the first switch 122a so that the resonance circuit 121 forms a closed loop based on the detection of the wireless power reception device of the first charging method at a first time point t1. It can be controlled in the on state (1212). As the resonance circuit 121 forms a closed loop, the resonance circuit 121 can be used as a repeater. Meanwhile, the wireless power transmission device 101 may control the second switch 122b to be in the off state 1222 in order to quickly charge the wireless power reception device of the first charging method. Meanwhile, the wireless power transmission device 101 may, for example, periodically perform a detection operation of the wireless power reception device of the second charging type for a designated time period (Δt). For example, the wireless power transmission device 101 may control the second switch 122b to be in the on state (1223, 1225, 1227) during a designated time period (Δt), and the second switch may be turned on during other periods. (122b) can be controlled to the off state (1222, 1224, 1226, 1228). During a designated time period (Δt) in which the second switch 122b is controlled to be in the on state (1223, 1225, 1227), the components of the second charging method may operate, and the wireless power transmission device 101 may operate in the second charging mode. A detection operation of a wireless power receiving device can be performed.

Meanwhile, at the second time t2, it is assumed that the wireless power transmission device 101 has detected a wireless power reception device of the second charging method. For example, if the wireless power transmission device 101 confirms that the wireless power reception device of the first charging method and the wireless power reception device of the second charging method will be charged simultaneously, the first switch ( While maintaining the on state 1213 of 122a), the on state 1230 of the second switch 122b can be maintained. In this case, the wireless power receiving device of the first charging method and the wireless power receiving device of the second charging method may be charged simultaneously. Meanwhile, if the wireless power receiving device of the first charging method is selected as the charging target (or is set to have a higher priority), the first switch 122a is in the on state and the second switch 122b ) may be controlled to be off. Meanwhile, if the wireless power receiving device of the second charging method is selected as the charging target (or is set to have a higher priority), the first switch 122a is in the off state and the second switch 122b ) may be controlled to the on state, but there is no limit.

Meanwhile, at the third time point (t3), charging interruption events such as full charge of the wireless power receiving device of the first charging method and/or occurrence of an error in the wireless power receiving device of the first charging method Let us assume what has been confirmed. Based on the charging interruption event, the wireless power transmission device 101 may control the first switch 122a to be in the off state 1214. The resonance circuit 121 may not form a closed loop. If the wireless power receiving device of the second charging method is still charging, the wireless power transmitting device 101 may maintain the on state 1231 of the second switch 122b.

FIG. 13 shows a flowchart for explaining a method of operating a wireless power transmission device according to an embodiment.

According to one embodiment, the wireless power transmission device 101 (eg, processor 120) may detect a wireless power reception device of the second charging type in operation 1301. In operation 1303, the wireless power transmission device 101 may perform an operation for charging the wireless power reception device of the second charging method. In operation 1305, the wireless power transmission device 101 may detect the wireless power reception device of the first charging type while performing an operation for charging the wireless power receiving device of the second charging type. As described above, the wireless power transmitting device 101 determines whether additional conditions are satisfied and/or transmitting/receiving a communication signal with the wireless power receiving device of the first charging method and/or the external wireless power transmitting device 11. Based on this, a wireless power receiving device of the first charging method can be detected. Based on detection of the wireless power receiving device of the first charging method, the wireless power transmitting device 101 may select a charging target device based on priority and/or user selection in operation 1307. For example, the priority between the first charging method and the second charging method may be set in advance or based on user selection. For example, the priority may be set based on the current status of the wireless power receiving device of the first charging method and the wireless power receiving device of the second charging method. For example, based on the current remaining battery capacity of the wireless power receiving device of the first charging method and the wireless power receiving device of the second charging method, a higher priority may be set to the wireless power receiving device with a smaller remaining battery amount. However, as of now, there is no limit to the type of information used. For example, the wireless power transmission device 101 may select a wireless power reception device to perform charging based on the user's selection.

According to one embodiment, when the first charging method is selected, the wireless power transmission device 101 may control the state of at least one switch 221 to the first state in operation 1309. The wireless power transmission device 101 may provide a first type of indication in operation 1311. The first type of indication may be, for example, an indication indicating that the wireless power receiving device of the first charging method is being charged, but there is no limitation, and provision of the first type of indication may be omitted. The user may recognize that the wireless power receiving device of the second charging method is not being charged based on the first type of indication. The wireless power transmission device 101 may stop charging the wireless power reception device of the second charging method based on the selection of the wireless power reception device of the first charging method. For example, the wireless power transmission device 101 may control the DC/DC converter 141 and/or the conversion circuit 134 not to operate. When the second charging method is selected, the wireless power transmission device 101 may control the state of at least one switch 221 to the second state in operation 1313. The wireless power transmission device 101 may provide a second type of indication in operation 1315. The second type of indication may be, for example, an indication indicating that the wireless power receiving device of the second charging method is being charged, but there is no limitation, and provision of the second type of indication may be omitted. The wireless power transmission device 101 may stop charging the wireless power reception device of the first charging method based on the selection of the wireless power reception device of the second charging method. For example, the wireless power transmission device 101 may transmit a communication signal commanding the wireless power reception device of the first charging method to stop charging. The wireless power receiving device of the first charging method that has received the communication signal may control a switch for selectively connecting the receiving coil to a load (eg, charger) to be in an off state. Accordingly, the wireless power receiving device of the first charging method may not absorb electromagnetic waves, and the wireless power receiving device of the second charging method may be charged at a relatively high speed.

FIG. 14 shows a flowchart for explaining a method of operating a wireless power transmission device according to an embodiment.

According to one embodiment, the wireless power transmission device 101 (eg, processor 120) may detect a wireless power reception device of the first charging type in operation 1401. In operation 1403, the wireless power transmission device 101 may perform an operation for charging the wireless power reception device of the first charging method. In operation 1405, the wireless power transmission device 101 may detect the wireless power reception device of the second charging type while performing an operation for charging the wireless power reception device of the first charging type. As described above, the wireless power transmission device 101 can continuously or periodically operate the components of the second charging type even while charging the wireless power receiving device of the first charging type, and thus the second charging type A detection operation for a charging type wireless power receiving device can be performed. Based on detection of the wireless power receiving device of the first charging method, the wireless power transmitting device 101 may select a charging target device based on priority and/or user selection in operation 1407. Selection of a device to be charged based on priority and/or user selection has been described above in FIG. 13 , so detailed description herein will not be repeated.

According to one embodiment, when the first charging method is selected, the wireless power transmission device 101 may control the state of at least one switch 221 to the first state in operation 1409. The wireless power transmission device 101 may provide a first type of indication in operation 1411. The first type of indication may be, for example, an indication indicating that the wireless power receiving device of the first charging method is being charged, but there is no limitation, and provision of the first type of indication may be omitted. The wireless power transmission device 101 may stop charging the wireless power reception device of the second charging method based on the selection of the wireless power reception device of the first charging method. When the second charging method is selected, the wireless power transmission device 101 may control the state of at least one switch 221 to the second state in operation 1413. The wireless power transmission device 101 may provide a second type of indication in operation 1415. The second type of indication may be, for example, an indication indicating that the wireless power receiving device of the second charging method is being charged, but there is no limitation, and provision of the second type of indication may be omitted. The wireless power transmission device 101 may stop charging the wireless power reception device of the first charging method based on the selection of the wireless power reception device of the second charging method.

FIG. 15 shows a flowchart for explaining a method of operating a wireless power transmission device according to an embodiment.

According to one embodiment, the wireless power transmission device 101 (eg, processor 120) may perform an operation for charging a wireless power reception device of one charging type in operation 1501. For example, the wireless power transmission device 101 may perform an operation for charging a wireless power reception device using either a first charging method or a second charging method. In operation 1503, the wireless power transmission device 101 may detect a wireless power reception device of another charging type while the wireless power reception device of one charging type is charging. In operation 1505, the wireless power transmission device 101 may check whether wireless power reception devices of multiple charging types are being charged. If it is confirmed that the wireless power receiving devices of the multiple charging type are charged (1505 - Yes), the wireless power transmitting device 101, in operation 1507, activates at least one switch to charge the wireless power receiving devices of the multiple charging type. (122) can be controlled. If it is confirmed that the wireless power receiving devices of a certain charging type are being charged (1505-No), in operation 1509, the wireless power transmitting device 101 charges at least one wireless power receiving device of the selected charging type. The switch 122 can be controlled. For example, as shown in FIG. 11A, when the wireless power transmission device 101 includes a first switch 122a, the first switch 122a may be controlled to be on in order to perform simultaneous charging. , there is no limit. For example, as shown in FIG. 11A, when the wireless power transmitting device 101 includes the first switch 122a, in order to charge the wireless power receiving device of the first charging method, the first switch 122a ) can be controlled to be on, but there is no limit. For example, as shown in FIG. 11A, when the wireless power transmitting device 101 includes the first switch 122a, in order to charge the wireless power receiving device of the second charging method, the first switch 122a ) can be controlled to be off, but there is no limit.

For example, as shown in FIG. 11B, when the wireless power transmission device 101 includes a first switch 122a and a second switch 122b, the first switch 122a must be used to perform simultaneous charging. In the on state, the second switch 122b can be controlled in the on state, but there is no limitation. For example, as shown in FIG. 11B, when the wireless power transmission device 101 includes a first switch 122a and a second switch 122b, charging of the wireless power reception device of the first charging method is performed. For this purpose, the first switch 122a can be controlled to be in the on state and the second switch 122b can be controlled to be in the off state, but there is no limitation. For example, as shown in FIG. 11B, when the wireless power transmitting device 101 includes a first switch 122a and a second switch 122b, charging of the wireless power receiving device of the second charging method is performed. To this end, the first switch 122a can be controlled to be in the off state and the second switch 122b can be controlled to be in the on state, but there is no limitation.

According to one embodiment, the wireless power transmission device 101 may include a resonance circuit 121 corresponding to the first frequency. The wireless power transmission device 101 may include a rectifier circuit 131 configured to rectify the first AC power of the first frequency provided from the resonance circuit 121. The wireless power transmission device 101 may include at least one conversion circuit 133 and 134 configured to convert the rectified power into second alternating current power of a second frequency. The wireless power transmission device 101 may include at least one transmission coil 105 and 107 connected to each of the at least one conversion circuit 133 and 134. The wireless power transmission device 101 may include at least one switch 122 connected to the at least one resonance circuit 121. The wireless power transmission device 101 may include a controller 120. The controller 120 confirms that a first wireless power reception device supporting a first charging method based on the first frequency is disposed on at least a portion of the at least one charging area of the wireless power transmission device 101. Based on this, the resonance circuit 121 may be set to control the at least one switch 122 to form a closed loop. The controller 120 confirms that a second wireless power reception device supporting a second charging method based on the second frequency is disposed on at least a portion of the at least one charging area of the wireless power transmission device 101. Based on this, the resonance circuit 121 may be set to control the at least one switch 122 so as not to form a closed loop. The controller 120 may be set to control at least a portion of the at least one conversion circuit 133 and 134 to provide the second AC power of the second frequency. The second AC power may be provided to at least a portion of the at least one transmission coil 105 and 107.

According to one embodiment, the wireless power transmission device 101 may further include a first housing 110 including a coil forming the resonance circuit 121. The first housing 110 may include a first transmission coil 105 among the at least one transmission coils 105 and 107.

According to one embodiment, the wireless power transmission device 101 may further include a second housing 112 that is different from the first housing 110. The second housing 112 may include a second transmission coil 107 that is different from the first transmission coil 105 among the at least one transmission coil 105 and 107.

According to one embodiment, the at least one switch 122 may include first switches 122a, 122aa, and 122ab connected in parallel to the resonance circuit 121.

According to one embodiment, the controller 120 controls the at least one switch 122 so that the resonance circuit 121 forms a closed loop, at least as part of the operation of controlling the first switch 122a and 122aa. , 122ab) can be set to be controlled in the on state. The controller 120 turns off the first switches 122a, 122aa, and 122ab as at least part of the operation of controlling the at least one switch 122 so that the resonance circuit 121 does not form a closed loop. It can be set to control by state.

According to one embodiment, the at least one switch 122 includes first switches 122a, 122aa, and 122ab connected in parallel to the resonance circuit 121, the resonance circuit 121, and the rectification circuit 131. ) may include a second switch (122b, 122ba, 122bb) connected in series between them.

According to one embodiment, the controller 120 controls the at least one switch 122 so that the resonance circuit 121 forms a closed loop, at least as part of the operation of controlling the first switch 122a and 122aa. , 122ab) may be set to be controlled in the on state, and the second switches 122b, 122ba, and 122bb may be controlled to be in the off state. The controller 120 turns off the first switches 122a, 122aa, and 122ab as at least part of the operation of controlling the at least one switch 122 so that the resonance circuit 121 does not form a closed loop. It can be set to control the state and control the second switches 122b, 122ba, and 122bb to the on state.

According to one embodiment, the controller 120 controls the at least one switch 122 so that the resonance circuit 121 does not form a closed loop, and provides the at least one switch 122 to provide alternating current power for detection. It may be set to control at least some of the conversion circuits 133 and 134. The controller 120 may be set to check whether a second wireless power receiving device supporting the second charging method is deployed based on whether at least one condition is satisfied during the provision of the AC power. .

According to one embodiment, the wireless power transmission device 101 may further include a communication module supporting short-distance communication. The controller 120 determines whether the first wireless power reception device is deployed based on a communication signal received from an external wireless power transmission device 101 different from the wireless power transmission device 101 through the communication module. It can be further set to check whether or not. The communication signal may include information indicating that the external wireless power transmission device 101 detects the first wireless power reception device.

According to one embodiment, the wireless power transmission device 101 may further include a communication module supporting short-distance communication. The controller 120 receives the first wireless power based on a communication signal received from the first wireless power transmission device 101 through the communication module and/or a change in impedance for the resonance circuit 121. It may be further configured to check whether the device is deployed.

According to one embodiment, the controller 120 includes at least a portion of the at least one conversion circuit 133 and 134 to provide the second AC power of the second frequency for charging the second wireless power receiving device. During control, it may be further configured to detect the first wireless power receiving device.

According to one embodiment, the controller 120 operates the at least one switch in response to the selected wireless power receiving device based on whether one of the first wireless power receiving device and the second wireless power receiving device is selected. It can be further set to control the on/off state of 122.

According to one embodiment, the controller 120 determines that the resonance circuit 121 forms a closed loop based on confirmation that both the first wireless power receiving device and the second wireless power receiving device are charged. It may be further set to control the on/off state of the at least one switch 122 so that a portion of the induced electromotive force generated in the resonance circuit 121 is provided to the rectifier circuit 131.

According to one embodiment, the controller 120 controls the at least one switch 122 so that the resonance circuit 121 forms a closed loop based on detection of the first wireless power receiving device, It may be further configured to detect the second wireless power receiving device.

According to one embodiment, the controller 120 operates the at least one switch in response to the selected wireless power receiving device based on whether one of the first wireless power receiving device and the second wireless power receiving device is selected. It can be further set to control the on/off state of 122.

According to one embodiment, the controller 120 determines that the resonance circuit 121 forms a closed loop based on confirmation that both the first wireless power receiving device and the second wireless power receiving device are charged. It may be further set to control the on/off state of the at least one switch 122 so that a portion of the induced electromotive force generated in the resonance circuit 121 is provided to the rectifier circuit 131.

According to one embodiment, a resonance circuit 121 corresponding to a first frequency, a rectifier circuit 131 set to rectify the first AC power of the first frequency provided from the resonance circuit 121, and the rectified power at least one conversion circuit (133, 134) set to convert into second AC power of a second frequency, at least one transmission coil (105, 107) connected to each of the at least one conversion circuit (133, 134), and the at least one resonance A method of operating a wireless power transmission device 101 including at least one switch 122 connected to a circuit 121 includes the first switch on at least a portion of at least one charging area of the wireless power transmission device 101. 1 Based on confirmation that a first wireless power receiving device supporting a first charging method based on frequency is disposed, the at least one switch 122 so that the resonance circuit 121 forms a closed loop. It may include an operation to control. The operating method is based on confirming that a second wireless power receiving device supporting a second charging method based on the second frequency is disposed on at least a portion of the at least one charging area of the wireless power transmitting device 101. , may include controlling the at least one switch 122 so that the resonance circuit 121 does not form a closed loop. The operating method may include controlling at least a portion of the at least one conversion circuit 133 and 134 to provide the second AC power of the second frequency. The second AC power may be provided to at least a portion of the at least one transmission coil 105 and 107.

According to one embodiment, the at least one switch 122 may include first switches 122a, 122aa, and 122ab connected in parallel to the resonance circuit 121. The operation of controlling the at least one switch 122 so that the resonance circuit 121 forms a closed loop may include controlling the first switches 122a, 122aa, and 122ab in an on state. The operation of controlling the at least one switch 122 so that the resonance circuit 121 does not form a closed loop may include controlling the first switches 122a, 122aa, and 122ab to be in an off state.

According to one embodiment, the at least one switch 122 includes first switches 122a, 122aa, and 122ab connected in parallel to the resonance circuit 121, the resonance circuit 121, and the rectification circuit 131. ) may include a second switch (122b, 122ba, 122bb) connected in series between them. The operation of controlling the at least one switch 122 so that the resonance circuit 121 forms a closed loop includes controlling the first switches 122a, 122aa, and 122ab to be in the on state, and turning the second switch ( 122b, 122ba, 122bb) can be controlled to be in an off state. The operation of controlling the at least one switch 122 so that the resonance circuit 121 does not form a closed loop includes controlling the first switches 122a, 122aa, and 122ab to be in an off state, and the second switch (122b, 122ba, 122bb) can be controlled to be in the on state.

According to one embodiment, the operating method includes controlling the at least one switch 122 so that the resonance circuit 121 does not form a closed loop, and converting the at least one switch to provide alternating current power for detection. It may include an operation to control at least some of the circuits 133 and 134. The operating method may include checking whether a second wireless power receiving device supporting the second charging method is deployed based on whether at least one condition is satisfied during the provision of the AC power.

According to one embodiment, the operating method determines whether the first wireless power reception device is deployed based on a communication signal received from an external wireless power transmission device 101 that is different from the wireless power transmission device 101. May include confirmation actions. The communication signal may include information indicating that the external wireless power transmission device 101 detects the first wireless power reception device.

According to one embodiment, the operating method is based on a communication signal received from the first wireless power transmitting device 101 and/or an impedance change for the resonance circuit 121, the first wireless power receiving device It may include an operation to check whether is placed.

According to one embodiment, the operating method includes controlling at least a portion of the at least one conversion circuit (133, 134) to provide the second AC power of the second frequency for charging the second wireless power receiving device. During this time, the operation may include detecting the first wireless power reception device.

According to one embodiment, the operating method includes, based on selection of one of the first wireless power receiving device and the second wireless power receiving device, the at least one switch 122 in response to the selected wireless power receiving device. ) may include an operation to control the on/off state.

According to one embodiment, the operating method includes, based on confirmation that both the first wireless power receiving device and the second wireless power receiving device are charged, the resonance circuit 121 forms a closed loop and the resonance circuit 121 forms a closed loop. It may include controlling the on/off state of the at least one switch 122 so that a portion of the induced electromotive force generated in the circuit 121 is provided to the rectifier circuit 131.

According to one embodiment, the operating method may include controlling the at least one switch 122 so that the resonance circuit 121 forms a closed loop based on detection of the first wireless power receiving device. 2 May include the operation of detecting a wireless power receiving device.

According to one embodiment, the operating method includes, based on selection of one of the first wireless power receiving device and the second wireless power receiving device, the at least one switch 122 in response to the selected wireless power receiving device. ) may include an operation to control the on/off state.

According to one embodiment, the operating method includes, based on confirmation that both the first wireless power receiving device and the second wireless power receiving device are charged, the resonance circuit 121 forms a closed loop and the resonance circuit 121 forms a closed loop. It may include controlling the on/off state of the at least one switch 122 so that a portion of the induced electromotive force generated in the circuit 121 is provided to the rectifier circuit 131.

Electronic devices according to embodiments disclosed in this document may be of various types. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to embodiments of this document are not limited to the above-described devices.

The embodiments of this document and the terms used herein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various changes, equivalents, or replacements of the embodiments. In connection with the description of the drawings, similar reference numbers may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the above items, unless the relevant context clearly indicates otherwise. As used herein, “A or B”, “at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C”, and “A Each of phrases such as “at least one of , B, or C” may include any one of the items listed together in the corresponding phrase, or any possible combination thereof. Terms such as "first", "second", or "first" or "second" may be used simply to distinguish one component from another, and to refer to that component in other respects (e.g., importance or order) is not limited. One (e.g., first) component is said to be “coupled” or “connected” to another (e.g., second) component, with or without the terms “functionally” or “communicatively.” When mentioned, it means that any of the components can be connected to the other components directly (e.g. wired), wirelessly, or through a third component.

The term "module" used in embodiments of this document may include a unit implemented in hardware, software, or firmware, and is interchangeable with terms such as logic, logic block, component, or circuit, for example. It can be used as A module may be an integrated part or a minimum unit of the parts or a part thereof that performs one or more functions. For example, according to one embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

One embodiment of this document is software that includes one or more instructions stored in a storage medium (e.g., internal memory or external memory) that can be read by a machine (e.g., wireless power transmission device 101). It can be implemented as (e.g. a program). For example, a processor (e.g., processor 120) of a device (e.g., wireless power transmission device 101) may call at least one command among one or more commands stored from a storage medium and execute it. This allows the device to be operated to perform at least one function according to the at least one instruction called. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. A storage medium that can be read by a device may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' only means that the storage medium is a tangible device and does not contain signals (e.g. electromagnetic waves), and this term refers to cases where data is semi-permanently stored in the storage medium. There is no distinction between temporary storage cases.

According to one embodiment, the method according to the embodiments disclosed in this document may be provided and included in a computer program product. Computer program products are commodities and can be traded between sellers and buyers. The computer program product may be distributed in the form of a machine-readable storage medium (e.g. compact disc read only memory (CD-ROM)) or through an application store (e.g. Play StoreTM) or on two user devices (e.g. It can be distributed (e.g. downloaded or uploaded) directly between smart phones) or online. In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

According to one embodiment, each component (e.g., module or program) of the above-described components may include a single or plural entity, and some of the plurality of entities may be separately placed in other components. there is. According to one embodiment, one or more of the above-described corresponding components or operations may be omitted, or one or more other components or operations may be added. Alternatively or additionally, multiple components (eg, modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each component of the plurality of components in the same or similar manner as those performed by the corresponding component of the plurality of components prior to the integration. . According to embodiments, operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, or omitted. Alternatively, one or more other operations may be added.

Claims (20)

In the wireless power transmission device 101,
A resonance circuit 121 corresponding to the first frequency;
a rectifier circuit 131 set to rectify the first AC power of the first frequency provided from the resonance circuit 121;
at least one conversion circuit (133, 134) configured to convert the rectified power into second alternating current power of a second frequency;
At least one transmitting coil (105, 107) connected to each of the at least one conversion circuit (133, 134);
At least one switch 122 connected to the at least one resonance circuit 121; and
Includes a controller 120,
The controller 120 confirms that a first wireless power reception device supporting a first charging method based on the first frequency is disposed on at least a portion of the at least one charging area of the wireless power transmission device 101. Based on:
is set to control the at least one switch 122 so that the resonance circuit 121 forms a closed loop,
The controller 120 confirms that a second wireless power reception device supporting a second charging method based on the second frequency is disposed on at least a portion of the at least one charging area of the wireless power transmission device 101. Based on:
Controlling the at least one switch 122 so that the resonance circuit 121 does not form a closed loop,
is set to control at least a portion of the at least one conversion circuit (133, 134) to provide the second alternating current power of the second frequency, and the second alternating current power is provided by at least a portion of the at least one transmitting coil (105, 107) A wireless power transmission device (101). According to claim 1,
It further includes a first housing 110 including a coil forming the resonance circuit 121,
The first housing 110 is a wireless power transmission device 101 including a first transmission coil 105 among the at least one transmission coil 105 and 107. According to either claim 1 or 2,
It further includes a second housing 112 that is different from the first housing 110,
The second housing 112 includes a second transmission coil 107 that is different from the first transmission coil 105 among the at least one transmission coil 105 and 107. According to any one of claims 1 to 3,
The at least one switch 122 includes first switches 122a, 122aa, and 122ab connected in parallel to the resonance circuit 121. According to any one of claims 1 to 4,
The controller 120 turns on the first switches 122a, 122aa, and 122ab as at least part of the operation of controlling the at least one switch 122 so that the resonance circuit 121 forms a closed loop. Control it with
The controller 120 turns off the first switches 122a, 122aa, and 122ab as at least part of the operation of controlling the at least one switch 122 so that the resonance circuit 121 does not form a closed loop. A wireless power transmission device 101 set to be controlled by state. According to any one of claims 1 to 5,
The at least one switch 122 is connected in series between first switches 122a, 122aa, and 122ab connected in parallel to the resonance circuit 121 and the resonance circuit 121 and the rectifier circuit 131. A wireless power transmission device 101 including second switches 122b, 122ba, and 122bb. According to any one of claims 1 to 6,
The controller 120 turns on the first switches 122a, 122aa, and 122ab as at least part of the operation of controlling the at least one switch 122 so that the resonance circuit 121 forms a closed loop. and controlling the second switches 122b, 122ba, and 122bb to be in the off state,
The controller 120 turns off the first switches 122a, 122aa, and 122ab as at least part of the operation of controlling the at least one switch 122 so that the resonance circuit 121 does not form a closed loop. A wireless power transmission device (101) set to control the second switch (122b, 122ba, 122bb) to the on state. According to any one of claims 1 to 7,
The controller 120:
Controlling the at least one switch (122) so that the resonance circuit (121) does not form a closed loop, and controlling at least a portion of the at least one conversion circuit (133, 134) to provide alternating current power for detection,
The wireless power transmission device 101 is further configured to determine whether a second wireless power reception device supporting the second charging method is deployed, based on whether at least one condition of providing the AC power is satisfied. According to any one of claims 1 to 8,
Further comprising a communication module supporting short-distance communication,
The controller 120:
Further set to check whether the first wireless power reception device is deployed based on a communication signal received from an external wireless power transmission device 101 different from the wireless power transmission device 101 through the communication module, and ,
The communication signal includes information indicating that the external wireless power transmission device 101 detects the first wireless power reception device. According to any one of claims 1 to 9,
Further comprising a communication module supporting short-distance communication,
The controller 120:
Determine whether the first wireless power receiving device is deployed based on a communication signal received from the first wireless power transmitting device 101 through the communication module and/or a change in impedance for the resonance circuit 121. A wireless power transmission device 101 further configured to do so. According to any one of claims 1 to 10,
The controller 120 controls at least a portion of the at least one conversion circuit 133 and 134 to provide the second AC power of the second frequency for charging the second wireless power receiving device. 1 A wireless power transmitting device 101 further configured to detect a wireless power receiving device. According to any one of claims 1 to 11,
The controller 120,
Based on whether one of the first wireless power receiving device and the second wireless power receiving device is selected, further configured to control the on/off state of the at least one switch 122 in response to the selected wireless power receiving device. Wireless power transmission device (101). According to any one of claims 1 to 12,
The controller 120,
Based on the confirmation that both the first wireless power receiving device and the second wireless power receiving device are charged, the resonance circuit 121 forms a closed loop and a portion of the induced electromotive force generated in the resonance circuit 121 The wireless power transmission device 101 is further configured to control the on/off state of the at least one switch 122 so that is provided to the rectifier circuit 131. According to any one of claims 1 to 13,
The controller 120 controls the at least one switch 122 so that the resonance circuit 121 forms a closed loop based on detection of the first wireless power reception device, while receiving the second wireless power. A wireless power transmission device 101 further configured to detect the device. According to any one of claims 1 to 14,
The controller 120 turns on/off the at least one switch 122 in response to the selected wireless power receiving device, based on whether one of the first wireless power receiving device and the second wireless power receiving device is selected. The wireless power transmission device 101 is further configured to control the off state. According to any one of claims 1 to 15,
The controller 120 determines that the resonance circuit 121 forms a closed loop based on confirmation that both the first wireless power reception device and the second wireless power reception device are charged. The wireless power transmission device 101 is further configured to control the on/off state of the at least one switch 122 so that a portion of the induced electromotive force generated in is provided to the rectifier circuit 131. A resonance circuit 121 corresponding to a first frequency, a rectifier circuit 131 set to rectify the first AC power of the first frequency provided from the resonance circuit 121, and the rectified power into a first AC power of the second frequency. 2 At least one conversion circuit (133, 134) set to convert to alternating current power, at least one transmission coil (105, 107) connected to each of the at least one conversion circuit (133, 134), and connected to the at least one resonance circuit (121) In the operating method of the wireless power transmission device 101 including at least one switch 122,
Based on confirmation that a first wireless power reception device supporting a first charging method based on the first frequency is disposed on at least a portion of the at least one charging area of the wireless power transmission device 101, the resonance circuit ( 121) comprising controlling the at least one switch 122 to form a closed loop,
The operating method is based on confirming that a second wireless power receiving device supporting a second charging method based on the second frequency is disposed on at least a portion of the at least one charging area of the wireless power transmitting device 101. :
Controlling the at least one switch 122 so that the resonance circuit 121 does not form a closed loop; and
Further comprising controlling at least a portion of the at least one conversion circuit (133, 134) to provide the second alternating current power of the second frequency, wherein the second alternating current power is supplied from one of the at least one transmitting coil (105, 107). A method of operating a wireless power transmission device 101 provided at least as a part. According to claim 17,
The at least one switch 122 includes first switches 122a, 122aa, and 122ab connected in parallel to the resonance circuit 121,
The operation of controlling the at least one switch 122 so that the resonance circuit 121 forms a closed loop includes controlling the first switches 122a, 122aa, and 122ab to be in an on state,
The operation of controlling the at least one switch 122 so that the resonance circuit 121 does not form a closed loop includes a wireless power transmission device ( 101) operation method. The method according to either claim 17 or 18,
The at least one switch 122 is connected in series between first switches 122a, 122aa, and 122ab connected in parallel to the resonance circuit 121 and the resonance circuit 121 and the rectifier circuit 131. It includes a second switch (122b, 122ba, 122bb),
The operation of controlling the at least one switch 122 so that the resonance circuit 121 forms a closed loop includes controlling the first switches 122a, 122aa, and 122ab to be in an on state, and turning the second switch ( 122b, 122ba, 122bb) are controlled to be in the off state,
The operation of controlling the at least one switch 122 so that the resonance circuit 121 does not form a closed loop includes controlling the first switches 122a, 122aa, and 122ab to be in an off state, and the second switch A method of operating a wireless power transmission device 101 that controls (122b, 122ba, 122bb) to be in the on state. The method according to any one of claims 17 to 20,
Controlling the at least one switch 122 so that the resonance circuit 121 does not form a closed loop, and controlling at least a portion of the at least one conversion circuit 133 and 134 to provide alternating current power for detection. ; and
An operation of checking whether a second wireless power receiving device supporting the second charging method is deployed based on whether at least one condition of providing the AC power is satisfied.
A method of operating the wireless power transmission device 101 further comprising:

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